* {
  margin: 0;
  padding: 0;
  list-style: none;
}

html,
body,
.box {
  width: 100%;
  height: 100%;
}

.box {
  display: flex;
  flex-direction: column;
}

.box>.top {
  width: 100%;
  height: 100px;
  background-color: skyblue;
  display: flex;
  justify-content: center;
  align-items: center;
  color: #fff;
  position: relative;
}

.box>.top>h1 {
  font-size: 50px;
}

.box>.top>p {
  position: absolute;
  right: 30px;
  bottom: 10px;
}
.box>.top>p>span{
  color: red;
}
.box>.top>p>button{
  cursor: pointer;
  padding: 2px 5px;
  background-color:#fff;
  border-radius: 3px;
  opacity: 0.8;
  outline: none;
  border: none;
}
.box>.top>p>button:hover{
  opacity:1;
  color: skyblue;
  
}

.box>.bottom {
  width: 100%;
  flex: 1;
  display: flex;
}

.box>.bottom>.left {
  height: 100%;
  width: 230px;
  background-color: deeppink;
}

/* .box>.bottom>.left>a { */
.box>.bottom>.left>ul>li>a {
  display: block;
  text-decoration: none;
  padding-left: 50px;
  padding-top: 20px;
  color: #fff;
  font-size: 30px;
}

.box>.bottom>.left>ul>li>ol {
  list-style: none;
  padding-left: 70px;
  color: #fff;
  transition: all 0.8s;
  height: 0;
  overflow: hidden;
}

.box>.bottom>.left>ul>li>ol>li>a {
  font-size: 20px;
  text-decoration: none;
  color: #fff;
}


.box>.bottom>.router-view {
  flex: 1;
  height: 100%;
  background-color: #f3f3f3;
}